If (a, b), (c, d) and (a-c, b-d) are collinear, then which one of the following is correct ?

If the points with the coordinates (a, ma), {b,(m+1)b}, {c,(m+2)c} are collinear, then which one of the following is correct ?

a, b, c, d are non-zero integers such that (ab) divides (cd). If a and c are coprime, then which one of the following is correct?

If a , b, c, d are non-zero integers such that a lt b lt c lt d and mean and median of a, b, c and d are both equal to zero, then which one of the following is correct?

If (4a + 7b) (4c - 7d) = (4a - 7b) (4c + 7d), then which one of the following is correct ?

If a^x = c^q = b and c^y = a^z = d then which one of the following is correct?

If a , b, c, d are non-zero integers such that a lt b lt c lt d and median of a, b, c are both equal to zero, then which one of the following is correct?

If a,b,c are in A.P. b, c,d are in G.P. and c,d,e are in H.P., then which one of the following is true :

If (x + 2) is the HCF of x^2 + ax + b and x^2 + cx + d (a != c and b != d) , then which one of the following is correct?

Given : (i) A^(+)+Brarr A+B^(+) (ii) B^(+)+Crarr X (iii) C^(+)+Drarr C+D^(+) (iv) B+D^(+)rarrB^(+)+D (v) A+C^(+)rarrA^(+)+C . If the standard potential value of A^+|A,B^+|B,C^+|C and D^(+)|D are p, q, r and s volt respectively, then which of the following is correct -